An all-seater stadium is a sports stadium in which every spectator has a seat. This is commonplace in professional association football stadiums in nations such as the United Kingdom, Spain, and the Netherlands. Most association football and American football stadiums in the United States and Canadian Football League stadiums in Canada are all-seaters, as are most baseball and track and field stadiums in those countries. A stadium that is not an all-seater has areas for attendees holding standing-room only tickets to stand and view the proceedings. Such standing areas are known as terraces in Britain. Stands with only terraces used to dominate the football attendance in the UK. For instance, the South Bank Stand behind the southern goal at Molineux Stadium, home of Wolverhampton Wanderers, had a maximum of 32,000 standing attenders, while the rest of the stadium hosted a little bit less than that; the total maximum attendance was around 59,000.

Some European countries, such as Germany, do not have all-seater stadiums. German fans expressed a preference to stand while watching football, so the country's grounds have large terraced areas. For instance, Borussia Dortmund's Westfalenstadion (commercially known as Signal Iduna Park) has an all-seated capacity of 65,829, but during Bundesliga games the attendance limit is set to 81,360. (If the general rule "two standing occupies the same space as one sitting" applies, then around 15,000 seats are replaced by 30,000 standing attenders at Bundesliga games.)

All-seater stadium

In the United Kingdom

All seated and completed in 1970 Meadowbank Stadium was the home of Meadowbank Thistle from 1974 until 1995.

All-seater stadium

Aberdeen reconstructed Pittodrie in 1978, putting benches on the open south terrace as the final part of a longer-term plan to make the ground all-seated. Subsequent to this, the south side of the ground was covered over, and Pittodrie Stadium was proclaimed as the country's first all-seated, all-covered ground, although the southern corners of the ground remained open to the skies. In 1981, Coventry City converted Highfield Road to all-seating, the first club in England to do so, at the instigation of the then chairman, Jimmy Hill. This move, forced on the fans, proved unpopular, with attendances declining, and terracing was reinstated at one end by 1985.

All-seater stadium

In 1986, Luton Town converted their Kenilworth Road stadium to all-seater status as one of the consequences of the Luton Town vs Millwall hooligan riot during their FA Cup sixth round match on 13 March 1985.

The first English professional football club to convert to all-seats following the watershed of the 1989 Hillsborough stadium disaster was Ipswich Town's Portman Road in 1992.

The other ground often cited as all-seated in Britain before 1990 was Ibrox, home of Rangers. However, although Ibrox had no terracing after the redevelopment which was completed in 1981, there was still a significant standing area in the 'Enclosure', the front portion of the old Main Stand.

St Johnstone opened the first purpose-built all-seater football stadium in the United Kingdom weeks after the Hillsborough disaster, with the opening of McDiarmid Park in August 1989.

All-seater stadiums have been compulsory in the English Premiership since the start of the 1994–95 season as a result of the Taylor Report, which gave recommendations to improve stadium safety after the Hillsborough disaster. The initial plan, drawn up in 1990, had recommended that standing areas should be banned from stadiums in the upper two tiers of the league from 1994 onwards, while stadiums in the lower two tiers had until 1999 to meet these requirements. A review of the proposals in 1992 saw non-Premiership and second tier clubs retain the option to have standing areas. From time to time there are calls for Premiership stadiums to be allowed to have standing areas, but these have always been rejected.

The compulsory introduction of all-seated stadiums in the upper reaches of English football saw the demolition of several famous terraced standing areas which had been iconic throughout the game and famous all over the world. The first such notable casualties were Manchester United's Stretford End and Arsenal's North Bank, both of which were demolished in 1992 to be replaced by new all-seated stands. Two years later, Liverpool demolished their iconic Spion Kop and replaced it with an all-seater stand, while a similar redevelopment occurred with Aston Villa's Holte End.